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The HK quarter zip offers a sleek and modern look. Made from 4-way Stretch French Terry, this piece provides superior flexibility and ease of movement. Whether you're hitting the gym, at the office, out for a drink, or out to dinner, this quarter zip is designed to keep up with your active lifestyle.

Replacement magazine spring for Mark 23 12rd magazine

Mark 23 front sight

3-Position retractable stock for MP5

MR556 A4 1.6MM GAS VENT SCREW. RIFLE AND PISTOL SHIP WITH 1.3MM INSTALLED.

Spare 12rd magazine for Mark 23 pistol.

3+4 Detent plate for all USP/HK45 pistols.

Incomplete gas block for MR556 A4

MR556 A4 1.7MM GAS VENT SCREW. RIFLE AND PISTOL SHIP WITH 1.3MM INSTALLED.

MR556 A4 2.0MM GAS VENT SCREW. RIFLE AND PISTOL SHIP WITH 1.3MM INSTALLED.

5+6 Detent plate will convert USP full size and USP Compact pistols to safety only variants.

MR556 A4 2.2MM GAS VENT SCREW. RIFLE AND PISTOL SHIP WITH 1.3MM INSTALLED.

Spare magazine fits the Mark23. 10 round magazine with flat floorplate.

MR556 A4 1.9MM GAS VENT SCREW. RIFLE AND PISTOL SHIP WITH 1.3MM INSTALLED.

MR556 A4 2.1MM GAS VENT SCREW. RIFLE AND PISTOL SHIP WITH 1.3MM INSTALLED.

Sear for Mark 23

Sear spring for Mark 23

Sear actuator for Mark 23

Disconnestor for Mark 23

Sear axle for Mark 23